Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756095Ab2JQCYN (ORCPT ); Tue, 16 Oct 2012 22:24:13 -0400 Received: from e28smtp03.in.ibm.com ([122.248.162.3]:45136 "EHLO e28smtp03.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755977Ab2JQCYL (ORCPT ); Tue, 16 Oct 2012 22:24:11 -0400 Subject: [PATCH RFC V2 0/5] Separate consigned (expected steal) from steal time. To: linux-kernel@vger.kernel.org From: Michael Wolf Cc: kvm@vger.kernel.org, peterz@infradead.org, mtosatti@redhat.com, glommer@parallels.com, mingo@redhat.com, avi@redhat.com, anthony@codemonkey.ws Date: Tue, 16 Oct 2012 21:23:45 -0500 Message-ID: <20121017022249.16949.2775.stgit@lambeau> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit x-cbid: 12101702-3864-0000-0000-0000051926B1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2132 Lines: 49 In the case of where you have a system that is running in a capped or overcommitted environment the user may see steal time being reported in accounting tools such as top or vmstat. This can cause confusion for the end user. To ease the confusion this patch set adds the idea of consigned (expected steal) time. The host will separate the consigned time from the steal time. The consignment limit passed to the host will be the amount of steal time expected within a fixed period of time. Any other steal time accruing during that period will show as the traditional steal time. TODO: * Change native_clock to take params and not return a value * Change update_rq_clock_task Changes from V1: * Removed the steal time allowed percentage from the guest * Moved the separation of consigned (expected steal) and steal time to the host. * No longer include a sysctl interface. --- Michael Wolf (5): Alter the amount of steal time reported by the guest. Expand the steal time msr to also contain the consigned time. Add the code to send the consigned time from the host to the guest Add a timer to allow the separation of consigned from steal time. Add an ioctl to communicate the consign limit to the host. arch/x86/include/asm/kvm_host.h | 11 +++++++++ arch/x86/include/asm/kvm_para.h | 3 ++ arch/x86/include/asm/paravirt.h | 4 ++- arch/x86/kernel/kvm.c | 8 ++---- arch/x86/kvm/x86.c | 50 ++++++++++++++++++++++++++++++++++++++- fs/proc/stat.c | 9 +++++-- include/linux/kernel_stat.h | 2 ++ include/linux/kvm.h | 2 ++ include/linux/kvm_host.h | 2 ++ kernel/sched/cputime.c | 21 +++++++++++++++- kernel/sched/sched.h | 2 ++ virt/kvm/kvm_main.c | 7 +++++ 12 files changed, 108 insertions(+), 13 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/